DaJakerBoss

bingo

coil whine (very crude explanation here) happens when significant amounts of power are flowing through electronics. enabling v-sync pins the graphics card at a lower framerate which, as it no longer has to put all that power into pumping more frames out and doing more calculations, lowers total power draw. typically this will help alleviate coil whine. however in your case it looks like even with vsync on your card is still doing a lot of work and eating up a lot of power. You might try lowering your settings if the whine is really that bad for you.

lots of problems here first off, it's an SFF computer, a.k.a small form factor, so your 1660TI won't fit in the case, you have to keep the side panel off second, the PSU is going to be very low wattage for efficiency. it most likely wont have the 8 (or 6) pin power cables your 1660ti needs to run third, SFF means it has a very bad cooler in it. It'll run, but it's going to get very very very hot, and won't boost like you want. You're better with an i7 10700k and even then it's going to struggle a lot. fouth, that computer doesn't actually support on paper anything more than

how does one just leave a 1070 on a toaster oven of all places

are you using them through DP or HDMI?

I should note, there are server-oriented X570 boards that do support ECC memory for something like a Ryzen 5950X, like this one from the monero subreddit EDIT: There's a lot of consumer X570 boards that also support ECC memory, worth poking around!

enable xmp in your bios

XMP can be enabled without a K-series CPU, so your 10700 should be able to get to those 3200MHz speeds without an overclockable processor. What was the specific BSoD reason? should be something more than just "Memory Management"

It will be fine, a little bit of extra amperage won't kill it outright. Might make a different noise tho

what do you mean it was overclocked like how did you know it was supposedly overclocked

what do you mean?

well how are the thermals? is it overheating? what are the clock speeds? much more at play than just power draw

reminder that your opinion is subjective

As long as the cable is still snug in the PSU, the big old rubber plug on that cable should've put most of the stress onto the structure of the PSU itself, not the pins or the connector. You should be fine, worth unplugging it and plugging it back in though

5900X is the cream-of-the-crop for gaming, anything will go well with it, even a 3090/6900XT.